WHITE RIVER JUNCTION — A South Londonderry man is facing a felony heroin possession charge as the result of a routine traffic stop that took place a month ago in Chester.

Ryan Magoon, 25, pleaded innocent to the charge last week in White River Junction criminal court.

Magoon was a passenger in a pickup that was stopped Feb. 10 for running a stop sign at the intersection of routes 11 and 103 in Chester. Vermont State Police Trooper Eric Vitali said he became suspicious because Magoon’s hands were shaking and he avoided eye contact.

Vitali said Magoon and the woman who was driving the truck each admitted they had driven to Springfield that day to buy a “bundle” of 10 bags of heroin from a local dealer for $120.

Vitali said a search of the pair turned up two small glassine bags of heroin in the driver’s pockets and seven bags of heroin were found in Magoon’s socks and his jacket.

Magoon allegedly told police he’d smoked marijuana earlier in the day and had snorted the 10th bag of heroin from the bundle while still at the dealer’s residence.

Magoon was convicted of reckless endangerment last fall and has prior convictions for violating abuse prevention orders, disorderly conduct, and violating conditions of release.